On page 42 of the recent O Gauge Railroading Magazine Run 325 (August/September 2022), Ken Hoganson's Article, "Two-Train Operation in a Compact Space", uses multiple Fastrack Curved Angles to form two concentric 180 degree curves in a 5 foot dimension/space.
This in essence creates an "almost" O60 outer curve and an "almost" O?? inner curve.
What software did Ken use that provides sufficient detail to use varing angles to form a 180 degree turn in a given dimension (in this example 60 inches)? Additionally the actual dimension is less than 60 inches to allow space for edge of table/track and "engine/car over hang". The same applies to the "inner" 180 degree turn.
If I am "off base", please correct me - I am in a learnng mode.
Thanks.